Sash lock and counterbalance



1 May 927 w. w. WHITE SASH LOCK AND COUNTERBALANGE 2 Sheets-Sheet 1Filed March 13. 1926 Hi 4 7 HI 7 Z I i|||| Z Ill andfill/Ill May 10,1927.

W. W. WHITE SASH LOCK AND COUNTERBAIJANCE Filed March 13, 1926 2Sheets-Sheet 2 Inventor Wnz 71 /1222,

Attorney Iii Patented May 10, 19237.

WILLIAM WALTER WHITE, or Los ANGELEs, CALIFORNIA.

SASH LO CK AND COUNTER-BALANCE.

Application filed March 13, 1926. Serial No. 94,476.'

r One of the objects of my said inventionis the provision of a simple,easily controlled and highly eliicient sash lock." e Another object ofmysaid invention is the provision of a peculiar and advantageouscombination sash, loclcand counterbalance for lower and upper sashes. V

Other objects and practical advantages of the invention will be fullyunderstood from the following description and claims when the same areread in connection with the drawings, accompanying and forming part ofthis specification, in which Figure '1 is an elevation illustrating asash frame and sashes equipped in accordance with one embodiment of myinvention. Figure 2 is an enlargedyertical section showing one of thesash locks. s 1 Figure 3 is a horizontal section taken in the planeindicated by the line 33 of s elv r Figures 4, 5 and 6 areviewsillustrative of a modification or elaboration of the invention in whichprovision is made not only for locking the sashes but forcounterbalancing the same. H V I Figure 7 is a detail perspective of oneof the'lockingv bars hereinafter explicitly referred to.' a v Figure 8is an enlarged fragmentary view showing one of the anti-friction rollerscomplementary to the sashes; I p Similar numerals designatecorresponding parts in Figures 1, 2, 3, 7 and 8 to which reference willfirst be made. I I show in Figure 1 a sash frame 1 in which are arrangedslidable sashes 2 and 3, each of the said sashes 2 and 3 having housedin one of its vertical edges antifrietion rollers such as 4, the saidanti-fric-e tion rollers 4 being opposed to the adjacent stilesofthe'frame 1 and being adapted to ease the vertical movement of the sash.

My novel sashlocks are arranged at the opposite sides of thesashes 2 and3, with reference to the anti-friction rollers 4, and there is one'ofthe said locks complementary to each sash, The said locks are identicalin construction and therefore a detailed description of the lock shownin Figures 2, 3 and Twill suifice to impart a definite understanding ofboth. By particular reference to Figures 2 and 3 it .will be noted thatthe sash has countersunk in one vertical edge thereof vertical rack 5and it will also be noted that an appropriate casing 6 is 20' opposed tothe periphery of the'gear 8 and 1s adapted to be moved into and outsecured in the ad acen t stile of the frame 1, the said casing 6 havingan opening 7 confronting the rack 5 and adapted for the play of the gear8 of my improvement, said gear 8 being meshed with the -rack 5 as bestshown in Figure 2. The gear 8 is mounted to rotate in the casing 6 andis formed 'inte gral with or appropriately fixed withrespect to a drum 9at its side,.the said drum 9 being used in conjunction with a frictionband 10, connected atone end 11 to the cas ng 6 and having its other endsubject to theaction of an expansion spring 12 on a headed rod-likesupport 13, earr'ied by the casing 6. "l\ianifest1y the spring 12 willoperate to hold the band 10 under yielding pressure againstthe perimeterof the drum 9, so that the gear 8 in cooperation with the rack 5 willprevent casual gravitation of the sash and will also 'prevent too freeendwise movement of the sash in either direct on. For use in conjunctionwith the gear 8,1 provide a bar 20', pivotally connected ati2l andhaving a recessed and toothed edge portion 22, and also having adepression 23 in its opposite edge, with ref erence to said depression,22. c

The toothed depressedportion of the bar of engagement with the teethof'sa'id gear. iVhen engaged with the gear 8; the bar 20 will manifestlyprevent rotation of the gear andin that way will effectively lock thesash either aga instupward movement or downward movement. Interposedbetween and connected to the bar 20fand an abutment 25 in the casing 6is an expansion spring 26 which tends t'othr'ust the bar 20 away fromthe peripheryof the gear 8. ,At 21 in the casing 6 IS a stop,]and at 28in said casing is pivotally mounted ado tent 29 which is preferablyshaped as illustrated in Figure 2. The said detent 28 has a stem portionadapted to engage the depression 23 in the edge of the bar 24, and saiddetent also has a Y-shapedhead for c0013 eration with the stop 27 andthe bit 30 of a key which key is adapted to be introduced through a,keyhole provided in the casing 6 and manipulated in the manner commonto a" door key. Assbefore stated the bar 20 is normally maintained bythe spring 26 out of engagement: with the teeth of the gear 8. flVhen, 7however, a key, is introduced into the casingand' is turned in one illdirection, thedetent will be swung by the bit of the key to the positionshown by full lines in Figure so as to move the bar 20 into lockingengagement with the gear 8. hilanilestly in said position of the partsthe sash connected with the gear 8 will be l' ly locked against movementin either direction. When, however, the detent 528 is swung to theposition shown by dotted lines in Figure 2- so that said detent abutsagainst the stop 27, the spring 2-6 will operate to disengage the bar 20from the gear 8, and the sash may thenvbe raised or lowered as desired.it will be uni'lerstood from the 'l'oregoing that both movements of thedetent are ollei-led through the mediun'i ol', the key; and it will alsobe mai'iil'est that by virtue of my improvement either sash may bequickly and strongly locked at various heights as desirable forventilation purposes.

In the embodimei'it illustrated in Figures =1-l, 5 and 6, a singlecasing (3 ie 'n'ovided l in conjunction with the two slid-able sashesment in either direetioi'i.

it and a, The said casing is provided with a keyhole ill) and the sashesare provided with racks 5 arranged. in parallel vertical planes, Figure0. Gears 8" are mounted in the casing ti and are meshed with the racks5, and itwill be noticed that the shafts S which carry the gears 8* areequipped with inl'vermeshed spur gears 8 so that the gears- 8 will turnin concert and when one of the gears S is at rest the other gear 8 willalso be atrest. It will also be under stood from li'gurc 5 that alocking bar similar to that before described is employed in conjunctionwith one oi the gears 8, the said locking bar 20 being similarlyconstructed to the bar 20 of Figures 2 and 7, and a spring 26 and adetent 28 similar to those before described being used in conunctionwith the bar 20.

By virtue of the construction illustrated in l igures el, 5 and (i, thesashes are onabled to counterbalance each other, and when one sash ismoved upwardly the other sash will be moved downwardly and vice 'versa;and it will also be appreciated that when the locking bar 20 is engagedwith one ()It' the gears 8", both gears S will be strongly held againstrotation, and both sashes will be securely locked against movelVhen,however, it is desired to render the sashes free :tor uujivcment, it issimply necessary for the operator to introduce a key through the keyhole30, and manipulate the detent 538 so that the spring 26 can expand andpress the bar 520 out of engagement with the adjacent gear 8, whereuponthe sashes will be rendered :lree and both sashes may be moved inconcert and in opposite directions by stress applied to one of saidsashes.

It will be appreciated from the foregoing that both en'ibodiments of myinvention are simple and compact in construction and are devoid ofdelicate parts such as are likely to get out of order after a shortperiod of use.

I have entered into a detailed description of the construction andrelative arrangement oi the parts embraced in the present and preferredembodiment of my invention inv order to impart an exact understandingottsaid embodiment. I do notdesire, however, to he understood as limitingmyself to the specific construction and relative arrangeiug doliued bymy appointed claims within the scope oi? which changes in structure andin arrangement may be made without departure from my invention.

Having described my invention, What I claim and desire to secure byLetters Patent, is:

1. In combination, a sash frame, a slidable sash, a rack carried by saidsash, a casing housed in one stile oi" the frame and having a key hole,a gear mounted in said casing and meshed. with said rack, a locking barpivoted at one end in the casing and having a recessed and toothed edgeportion movable into and out of engagement with the teeth of the gearand also having a depression in its opposite edge, spring means tendingto thrust said bar out of engagement with the gear, and a pivoted detentmounted in the casing and adapted in one position to hold the bar inengagement with the gear and in another position to permit movement ofthe bar under the action of the spring out of engagement with the gear;said detent being operable by a key introduced through the keyhole inthe casing.

2. In combination, asash frame, a slidable sash, a rack carried by saidsash, a casing ment of parts as disclosed, my invention be housed in onestile of the frame having a hey hole and also having a stop, a gearmounted in said casing and meshed with said rack, a locking bar pivotedat one end in the using andhaving a recessed and toothed end portionmovable into and out of eng a ement with the teeth of the gear and a sohaving a depression in its opposite edge, spring means tending to thrustsaid bar out of engagement with the gear, and a pivoted detent mountedin the casing and adapted in one position to hold the bar in engagementwith the gear and in another position to permit movementof the bar underthe action oi the spring out of engagement with the gear; said detentbeing introduced through the keyhole in the easing, and said detentbeing of general Y-forin and arranged to cooperate with a stop in thecasin and the depression in the toothed bar.

3. The combination of a sash frame, slidoperable by a key able sashes insaid frame and movable in parallel planes and equipped With racks,

gears mounted in one of the stiles of the frame and meshed withthe'racks of the sashes and connected together whereby they are causedto turn in concert, a casing containing said gears and having a keyhole,and

means controllable by a key introduced through the key hole of thecasing and arranged to cooperate with the teeth of one of 10 the gearsfor the positive locking of the gears.

In testimony whereof I aifix my signature.

WILLIAM W. WHITE.

